Revert "Codex Agent integration: HTTP surface + plugin bundle + Settings UI"

This reverts commit 8c2705b42a.

integrations/codex/.codex-plugin/plugin.json

@@ -1,22 +0,0 @@
-{
-  "name": "odysseus",
-  "version": "0.1.1",
-  "description": "Connect Codex to a scoped Odysseus instance.",
-  "author": {
-    "name": "Odysseus"
-  },
-  "skills": "./skills/",
-  "interface": {
-    "displayName": "Odysseus",
-    "shortDescription": "Use scoped Odysseus tools from Codex.",
-    "longDescription": "Connects Codex terminal sessions to Odysseus through user-controlled scoped API tokens. Codex must use /api/codex/* endpoints so Odysseus Settings can enforce tool access.",
-    "developerName": "Odysseus",
-    "category": "Productivity",
-    "capabilities": [
-      "todos",
-      "email",
-      "scoped-api"
-    ],
-    "defaultPrompt": "Use Odysseus only through configured scoped access. Check capabilities before reading or writing data."
-  }
-}